摘要:
An object of the present invention is to provide a method for conducting electric activation of an electric double layer capacitor, the method making it possible to increase the electrostatic capacitance and to decrease the internal resistance. The method is for conducting electric activation of an electric double layer capacitor in which nonporous carbonaceous electrodes containing graphite-like fine crystalline carbon are soaked in an organic electrolytic solution. The method at least comprises: charging the electric double layer capacitor at a constant current until the interelectrode voltage reaches a predetermined voltage which is not lower than the electrostatic capacitance developing voltage but lower than the rated voltage; conducting constant voltage charging for a predetermined time during which ions of solutes in the organic electrolytic solution are conceived to be adsorbed uniformly on the surface of the fine crystalline carbon at that predetermined voltage.
摘要:
The present invention provides a separator for insulating a positive electrode and a negative electrode, the separator having mechanical strength and oxidation-reduction resistance while being excellent in impregnatability with an electrolytic solution and ion mobility like conventional cellulose-containing separators for insulating a positive electrode and a negative electrode. A separator for insulating a positive electrode and a negative electrode, wherein the separator comprises a porous sheet containing cellulose and a latex with which the porous sheet is impregnated.
摘要:
An object of the present invention is to provide a method for conducting electric activation of an electric double layer capacitor, the method making it possible to increase the electrostatic capacitance and to decrease the internal resistance. The method is for conducting electric activation of an electric double layer capacitor in which nonporous carbonaceous electrodes containing graphite-like fine crystalline carbon are soaked in an organic electrolytic solution. The method at least comprises: charging the electric double layer capacitor at a constant current until the interelectrode voltage reaches a predetermined voltage which is not lower than the electrostatic capacitance developing voltage but lower than the rated voltage; conducting constant voltage charging for a predetermined time during which ions of solutes in the organic electrolytic solution are conceived to be adsorbed uniformly on the surface of the fine crystalline carbon at that predetermined voltage.
摘要:
The objects of the present invention are to improve characteristics of electric double layer capacitors, such as energy density and charge-and-discharge rate, and to provide a positive electrode for electric double layer capacitors useful for the foregoing object, and a simple method for its production. Disclosed is a positive electrode for electric double layer capacitors, wherein the electrode comprises graphite particles having a specific surface area of less than 10 m2/g.